Product Description Fimco's replacement Check Valve Kit for High Flo 2.1 GPM Pumps. OEM #5168820. | Fimco Replacement Check Valve Kit for 2.1 High Flo Pump Fimco Replacement Check Valve Kit for 2.1 High Flo Pump at Murdoch's Ranch & Home Supply $24.49 Buy Now Check Price on Amazon Check Price on eBay